Warp-stop motion



Oct. 18, 1949. s. w. LA ROCQUE I 2,485,533

WARP-STOP MOTION Filed March 24, 1948 s Sheets-Sheet. 1

Samuel m M. a

Oct. 18, 1949. s. w. LA ROCQUE 2,485,533

WARP-STOP MOTION Filed March 24, 1948 3 Sheets-Sheet 2 .Qi-m

Oct. 18, 1949. s, w LA RQGQUE- 2,485,533

WARP-STOP MOTION Filed March 24, 1948 3 Sheets-Sheet 3 Patented Oct. 18, 1949 f,

UNITED STATES PATENT OFFICE} 8 Claims.

My invention relates to improvements in electric warp stop motions for use in looms equipped with mechanical side filling stop motions.

- While I am aware that others have provided electric warp stop motions adapted to be used in conjunction with mechanical side filling stop motions, so far as I am aware these have only been connected to the rod for actuating the loom stopping means and have otherwise been entirely independent of the mechanical side filling stop motion and for their purpose have comprised a great multiplicity of parts. In addition, while these stop motions have theoretically functioned to stop the loom on back centre, in practice the stop motion mechanism tends to get so greasy that it will not stop the loom immediately and the loom will not become stopped until it gets to front centre. Thus, when the loom starts up again, there is not sufiicient throw of the lay to give a sharp beat-up to the laid thread, resulting in the laid thread being spaced from the previously woven cloth, thereby providing a socalled light or starting mark or cracky cloth. In order to avoid this, certain weavers have at-. tempted to urge the loom forward by hand so that it will again start up on back centre. Due, however, to the fact that the weaver has not as much strength as the power loom, this has tended to still leave a light or starting mark and cracky cloth, although the light mark is not so pronounced as it would have been otherwise. This has necessitated a certain amount of time in waste motion of the operator to move around to the front of the loom and pull the loom forward this extra amount, resulting in loss in production and increasing the cost of weaving, without thoroughly eliminating light starting marks and cracky cloth.

Objects of my invention are to improve upon the prior art structure of electric warp stop motions to overcome all of these defects.

In accordance with my invention I employ more of the parts of the mechanical side filling stop motion and I mount the magnetic switch adjacent the front of the loom instead of the centre of the loom and I mount an extra part on the knock-oil lever and provide an extra hook bar projecting forwardly from the knock-off lever which may be alternately raised or lowered by the magnetic switch of the electric circuit controlled by the usual needles.

Employing my invention, I add a projection to one already existing part of the mechanical side filling stop motion and one extra hook bar and eliminate nineteen parts formerly thought necessary. In applying electric warp stop motions to mechanical .side filling stop motions, thereby greatly decreasing the cost of applying a warp stop motion to a mechanical side filling stop motion and greatly decreasing the cost of renewal of the various parts thereof as they wear out, as it is only necessary to replace two strong parts in place of nineteen weak ones. I realized I was able to achieve this by raising the added hook above the path of the reciprocating upper end of the knock-01f lever, so that the end of the hook would be struck near the front of the lay by the advancing filling rod arm which normally strikes the upper end of the knock-ofi lever only when there is no filling passing over the lay and that this would still permit the side filling stop motion to function as usual and many of the same parts of the same mechanism to supplementally function as a warp stop motion in the event of breakage of the warp thread.

A further object of my invention is to provide a warp stop motion of this type which is more sensitive than former types as it has fewer parts of much less weight to actuate for its operation. This substantially eliminates ends running longitudinally of the cloth due to the failure of the warp stop motion to stop immediately.

A further object of my invention is to provide a device in which the loom will always stop on back centre. While my device initially starts to stop the loom on front centre, due to the inertia of the m or sluggishness of the stop motion mechanism due to oil being spilled thereon, in stopping it will always stop on back centre, thereby providing a structure which corrects the former objections in warp stop motions of this type, i. e., the elimination of light or starting marks and cracky cloth and the elimination of the time of the operator in walking around the loom and moving it by hand in an attempt to avoid these light starting marks which even then were only lessened not positively avoided, greatly increasing production of the loom and decreasing the weaving cost.

These and such other objects of my invention as may hereinafter appear will be best understood from a description of the accompanying drawings which illustrate an embodiment thereof applied to a Draper single box loom equipped with a mechanical side filling brake stop motion.

Fig. 1 is a diagrammatic end elevation of the outside of a loom equipped with a mechanical side filling stop motion and a former-type of 3 prior art warp stop motion employing a multiplicity of parts.

Fig. 2 is a diagrammatic end elevation of a loom showing the similar parts of the side fillin stop motion mechanism and my improved warp stop motion mechanism.

Fig. 3 is a diagrammatic longitudinal sectional view taken through the centre of the loom looking towards the end of the loom equipped with the side filling stop motion having my invention attached, with the parts in back centre position.

Fig. 4 is an enlarged side elevational view look-- ing towards the inside of the side wall of the loom having parts of the side filling stop motion mechanism and my invention attached, with the parts in substantially top centre position.

Fig. 5 is a side elevation generally similar to Fig. 4 with the parts moved to front centre position, and indicating how my invention functions to stop the loom.

Fig. 6 is a vertical sectional view taken along the line 6-6 of Fig. 5.

Fig. '7 is a perspective view of the improved knock-off bar I preferably employ.

In the drawings, wherein like characters of reference generally indicate like parts throughout, I I generally indicates a Draper single box loom equipped with a mechanical side filling stop motion. Said loom H is provided with the frame l3, the lay l5 oscillatable in the usual manner by a crankshaft (not shown) and having suitable means, such as picker sticks (not shown) for reciprocating a shuttle I4 across said la in the back centre position thereof.

Mechanical filling brake stop motions are old, and comprise:

A filling rod Ill, longitudinally mounted on the front portion of the lay IS. The centre of the lay is provided with a well H2. The shuttle l4, as it passes over the top of the lay, lays a filling thread across the lay. The filling motion prongs l6 project rearwardly from the rod ill into the well I2. The rod H! is reciprocated just prior to the shuttle passing over the middle of the lay, so that the prongs it project upwardly over the lay, as shown in dotted lines in Fig. 3, so that the shuttle l4, passing over the lay, may lay its filling thread over the well 12. After the shuttle has passed, the prongs l6 tend to drop down within the well, but are supported by the laid filling thread and cannot. The rod Ill, pivotally mounted on the front of the lay, projects to the left end of the lay and terminates in a depending end or drum l8, having a tip 28 projecting downwardly and forwardly therefrom. At said left-hand end of the loom, an L-shaped block 22 is mounted on the end of the breast beam 24, and has an extension 28 projecting rearwardly therefrom below the lay, toward the centre frame bar of the loom. This has a central extension 39 projecting downwardly therefrom, having a longitudinal slot 32 therein. Said extension 30 has an upper end 34 projecting further rearwardly therefrom, and the upper portion of said extension has a longitudinal slot 36, projecting forwardly from said upper end 34, to substantially the center portion of said depending portion 30. A filling motion cam 38, having a forwardly depending upper cam surface 40, has an extension projecting downwardly therefrom, having a bolt projecting laterally therefrom, longitudinally adjustably securable within said cam slot 3%, substantially adjacent the rear portion of the stroke of the lay. A knock-off lever 42 has a vertical slot 44 near the lower end thereof, and an upper end 46, having a rounded front Wall and a fiat rear Wall 47 normally projecting above the upper edge of the extension 28. Means are provided to adjustably join the lower end of said knock-off lever to a knock-off rod 48, which is attached to the brake lever 50, pivotally mounted on the front of the breast beam. The knock-o1f lever 42 is joined to the extension 3t by a bolt 52 which extends through the longitudinal slot 32 and the vertical slot 44, so that the effective operating upper end 46 thereof may be vertically and horizontally adjusted. The brake lever 50 actuates the usual band brake on the crank shaft (not shown), and has a projection contacting a projection on the power lever 54, which actuates, through mechanism not shown, the power for the loom, whether it be motor or belt.

In this mechanism, a shield plate 56, normally covers the inner portion of the extension 28, having an upper surface 58 normall flush with the upper surface 60 of said extension 28. The shield plate 56 is only raised upwardly so that its upper edge 58 will be above the upper end 46 of the knock-off lever 42, when the loom is restarted, and for this purpose a fiat spring 62 is pivotally mounted on the breast beam to depend therefrom, which strikes the front arm 64 of the pivotally mounted shield lever 66, having a rear arm 68 adapted to abut the front end of the shield 56 to urge it rearwardly and upwardly as the loom stops, the power lever 54 actuating the spring 62 to a position to so move the shield outwardly. After one pick of the loom, the shield 58 drops down to a position below the then exposed upper end 46 of the knock-off lever 42.

In use, the prongs l6 retain the tip 20 in a position above the upper end 46 of the knockoff lever, but should the filling be broken, the prongs IE will drop into the well ill, causing the tip 20 to get in the way of the upper end 4% of the knock-off lever so that the knock-01f lever will pivot on its pivot bolt 52, so that the lower end thereof will pivot rearwardly, causing the knock-01f rod 48 to pull the brake lever 50 rearwardly to actuate the brake and the power lever 54 rearwardly to shut off the power. The purpose of the cam 38, as explained, is to move the rod 20 to raise the prongs It in the manner explained only while the shuttle l4 passes overthe well I 2 and under the prongs l6.

1 Both the prior art warp stop mechanisms and my improved Warp stop mechanism comprise electrically operated warp stop mechanisms, functioning through the knock-01f lever rod 48 to actuate the brake and power levers 50 and 54. Both mechanisms are actuated through means of drop wire needles Tl) individually mounted on each warp thread l2, and on an insulated needle supporting rod 14. Each needle 10 has a hollow cut-away upper portion 16, terminating in a notch 18, and having a downwardly inclined surface 80, adjacent to such notch. The threads 12 extend through suitable holes 84 substantially centrally of the needles, Which in the embodiments shown comprise the upper ends 86 of slots 88, formed in the lower ends of said needles. An electric circuit has one terminal 90 connected to a positive pin contact 92, and the opposite terminal 94 connected to another ground rod contact 96. When a needle H1 drops, therefore, the pin contact 92 contacts the end of the notch 18, and the ground contact 96 contacts the inclined portion of the needle to complete a circuit through the needle arm 9I pivotally mounted as at 93 on the coil box 95, having an inner end 91 normally raised above the upper end of the metal magnetizable solenoid core 99 and adapted on energization of said core 99 on passage of current through the coil 98 to be depressed into contact therewith, thereby providing a magnetic switch and raising the free end IOI of said arm 9I. Any suitable source of electricity may be employed to energize the coil 98, and inasmuch as the showing in Fig. 3 is largely diagrammatic, I have illustrated it therein as comprising a storage battery I03 in the plus line connecting the contact 90 with the solenoid coil 98.

In the prior art, as shown in Figure 1, said solenoid coil 98 was mounted on a center bar I00 of the loom frame I3, and said solenoid rod or switch arm 9| had an end IOI projecting forwardly therefrom. A knock-oil link I02 was pivotally mounted on a casting I04, mounted on a frame crossbar I06, so as to pivot forwardly and backwardly thereon. The upper end of said knock-oil" link I02 had a knock-oil arm I08, pivotally mounted thereon, so as to project forwardly therefrom. The rear end of the lay was provided with a buffer pad 0. The front end of the knock-off arm I08 was provided with a spread-open end I I2, adapted to be raised to hit the buffer pad I I 0. When a warp thread I2 broke and the circuit 90--94 was energized, the solenoid coil 98 and core 99 were energized to depress the inner end 91 of the switch arm 9I, causing the free end IOI, projecting forwardly therefrom, to be simultaneously raised. This was connected by the rod II4 to a point on the knock-off arm I08, adjacent to the pivot thereof to raise said arm I08 to a position in line with the bufier pad I I0. As the lay continued its rearward stroke, the buffer pad II0 met the end H2 and the knock-off arm I08 pivoted the knock-off link I02 rearwardly. The knock-ofi link I02 was suitably connected to a continuation H6 of the knockoff rod 48, causing rearward movement thereof to actuate successively the brake and power levers 50 and 54, in the manner explained.

With my invention I eliminate the extension H6, the point of connection I20, the link I02,

its pivot rod I22, the knock-off arm I08, its pivot rod I24, and the buffer pad IIO.

My invention comprises making the electrical warp stop connection more of an integral part of the side filling stop motion, so as to utilize more of the parts thereof. For this purpose I merely provide a pivot pin I28, projecting laterally from near the upper end of the knock-off lever 42, and I provide a hooked bar I30 adapted to project forwardly from near the upper end 46 of said lever. Said bar I30 is provided with a pivot hole I32 near the rear end thereof, to receive the pivot pin I28. The front end of said bar I 30 is provided with the upwardlyprojecting hook I34, having a flat rear surface I36, and a rounded front surface I38. Said front end is also provided with a vhole I40 for receiving the laterally bent'end I42 of the connecting rod 4', which projects downwardly therefrom through the adjustment II3 to the free end IN or the switch arm 9|, actuated by the solenoid coil 98. So that the upper end of the rod 4' may readily reciprocate, a suitable longitudinal slot I44 is provided in the shelf I46, projecting outwardly from the rear tip of the extension 28. With this construction,

when the Warp end breaks, the solenoid 98 is actuated to raise the rod II4 to lift the hook I34 of the bar I30 above the upper surface 60' of the extensions 28, as shown in Figure 5, so that it will abut the end 20- of the filling motion rod I0 to stop the loom by pulling the upper end of the knock-01f lever 42 forwardly, to actuate the connecting rod 48 and the respective brake and power levers and 54. The loom is there-- fore knocked off on front centre, instead of rear centre, so that the inertia of the 10cm may be cut down so as to stop the loom at any desired portion of. the rear centre portion of the fell- I48 of the cloth, thereby eliminating any possibility of light or starting marks or cracky cloth.

If desired, suitable means, such as the adjusting grip I I3 adapted to receive separate rod portions II4a and II4b of the connecting, rod H4, is provided. Said grip II3 may comprise the two separate halves I50, each having two spaced transverse hemi-cylindrical channels near each end thereof adapted to be detachably secured together by the screw I54. It is obvious that by relative adjustment of the rod portions 411' and H41) in said grip II3 may the length of the rod I I4 be suitably adjusted.

It is thus obvious that with my invention many of the parts of the prior art warp stop motion mechanism shown in Fig. 1 are eliminated, name-' 1y nineteen parts, includingv all bolts and nuts, and; better results obtained by moving the magnetic switch to the front portion of the loom and attaching the hook bar I30 so that its front end will: substantially overlie said magnetic switch, there--' by only requiring the moving of said already existing parts forward on the loom and the attaching of the hook bar I30 and a pivot pin I28 for the hook bar I30 on the knock-01f lever 42.

It is apparent that when the magnetic switch functions to raise the hook I34 across the path of the depending tip 20 of the filling rod I0 that said filling rod will abut said hook as it approaches the front centre position of the stroke of the lay to cause the hook I34 to move forwardly thereby tilting the knock-off lever 42 to actuate the rod 48 to actuate the loom stop mechanism in exactlyor starting marks on the cloth or cracky cloth,

and the necessity of any manipulation of the loom to avoid said stopping marks, thereby speeding up production of the loom and consequently lowering the cost of the woven cloth. With my various adjustments, it is possible to adjust the stoppage of the lay to any position of its forward stroke, preferably in the back centre portion.

It is apparent that by the addition of merely two parts in place of nineteen that I have pro-. vided a novel type of electric stop motion mecha-v nism to be used in association with the already existing mechanical side filling stop motion mechanism employing. many more additional parts of.

said side filling stop motion mechanism than formerly, with the dvantages explained above.

It is understood that my invention is not limited to the specific embodiment shown and that various deviations may be made therefrom without departing from the spirit and scope of the appended claims What I claim is:

1. In a loom having a frame having side walls, an oscillatable lay having a well centrally thereof, means. to reciprocate a shuttle across said lay; a mechanical side filling stop motion, cmprising a. filling rod pivotally mounted on the lay extending from said well to adjacent a frame side wall, prongs projecting rearwardly from said rod within said well normally supported at a spaced distance from the bottom of the well by a filling thread laid on passage of the shuttle over the lay and an arm projecting downwardly and forwardly from said rod adjacent said frame side wall, a-filling motion cam having a forwardly depending upper cam surface longitudinally ad justably mounted on said loom adjacent the frame side wall at substantially top center of the oscillating stroke of the lay, a knock-off lever vertically and longitudinally adjustably pivotally mounted on said loom adjacent said frame side wall adjacent the top center of the stroke of the lay, having an upper end having a rounded front wall and a fiat rear wall tiltable forwardly by said filling rod arm on failure of the filling, means to stop said loom and a rod connecting said knockoff lever to said loom stopping means to stop the loom when the prongs drop to the bottom of the well due to the absence of a filling thread on the lay, and an electric warp stop motion comprising a bar having an upwardly projecting hook at the front end thereof having a fiat rear surface, means to pivotally mount the rear end of said bar on the upper end of said knock-off lever, a magnetic switch comprising a solenoid coil having a magnetizable core and a pivotable switch arm having an inner end normally raised above the solenoid core mounted on said loom underneath the front end of said bar adjacent the hook thereof, adjustable means connecting said switch arm to the front end of said hook bar of a length to raise said bar hook across the path of the oscillating filling rod arm, a drop wire needle supported by each warp thread, a transverse supporting rod underlying said needles and normall insulated therefrom, an electric circuit connected to said solenoid coil and connectable through a needle and said connecting rod on dropping of a needle due to breakage of a warp thread to ener ize the solenoid to lower the inner end of said switch arm to raise said bar hook across the path of said filling rod arm to abut said arm to cause said hook to tilt said knock-01f lever to actuate said loom stopping means on the front center portion of the stroke of the lay.

2. In a loom having a frame having side walls, an oscillatable lay having a well centrally thereof, means to reciprocate a shuttle across said lay; a mechanica side filling Stop: motion, comprising a filling rod pivotally mounted on the lay extending from said well to adjacent a frame side wall, prongs projecting rearwardly from said rod within said well normally supported at a spaced distance from the bottom of the well by a filling thread laid on passage of the shuttle over the lay and an arm projecting downwardly and forwardly from said rod adjacent said frame side wall, a filling motion cam having a forwardly depending upper cam surface mounted on said loom adjacentthe frame side wall at substantially top center of the oscillating stroke of the lay, aknock-off lever pivotally mounted on said loom adjacent said frame side wall adjacent top center of the stroke of the lay, having an upper end having a rounded front wall and a fiat rear wall tiltable forwardly by said filling rod arm on failure of the filling, means to stop said loom and a rod connecting said'knock-off lever to said loom stopping means to stop the loom when the prongs drops to the bottom of the well due to the absence of a filling thread on the lay," and an electric warp stop motion comprising a bar having an upwardly projectinghook at the front end thereof having a fiat rear surface, means to pivotally mount the rear end of said bar on the upper end of said knock-off lever, a magnetic switch comprising a solenoid coil havingv a magnetizable core and a. pivotable switch arm having an inner end normally raised: above the solenoid core mounted on saidloom underneath the front end of said bar adjacent the hookthereof, means connectsaid switch arm to the front end. of said hook bar of a length to raise said bar hook across the path of the oscillating filling rod arm, a drop Wire needle supported by each warp thread, a transverse supporting rod underlying said needles and normally insulated therefrom, an electric circuit connected to said solenoid coil and connectable through a needle and said connecting rod on dropping of a needle due to breakage of a warp thread to energize the solenoid to lower the inner end of said switch armto raise said bar hook across the path of said filling rod arm to abut said arm to cause said hook to tilt said knock-off lever to actuate said loom stopping means on the front center portion of the stroke of the lay.

3. In a loom having a frame having side walls, an oscillatable lay having a well centrally thereof, means to reciprocate a shuttle across said lay; a mechanical."side filling stop motion, comprising a filling rod pivotallymounted on the lay extending from said well to adjacent a frame side wall, prongs projecting rearwardly from said rod within said well normally supported at a spaced distancefrom the bottom of the well by a filling thread laid on passage of the shuttle over the lay and an arm projecting downwardly and forwardly from said rod adjacent said frame side wall, a filling motion cam having a forwardly depending upper cam surface longitudinally adjustably mounted on said loom adjacent the frame side wall at substantially top center of the oscillating stroke of the lay, a knock-off lever vertically and longitudinally adjustably pivotally mounted on said loom adjacent said frame side wall adjacent top center of the stroke of the lay, having an upper end having a rounded front wall and a flat rear wall tiltable forwardly by said filling rod arm on failure of the filling, means to stop said loom and a rod connecting said knock-off lever to said loom stopping means to stop the loom when the prongs drop to the bottom of the well due to the absence of a filling thread on the lay, and an electric warp stop motion comprising a bar having an upwardly projecting hook at the front end thereof havin a fiat rear surface, means to pivotally mount the rear end of said bar on the upper end of said knock-01f lever, a magnetic switch comprising a solenoid coil, and a pivotable switch arm having an inner end normally raised above the solenoid core mounted on said loom, adjustable means connectin said sole:

noid arm to the front end of said bar to raise said bar hook across the bar of the oscillating filling rod arm, a drop wire needle supported by each warp thread, a transverse supportin rod underlying said needles and normally insulated therefrom, an electric circuit connected to said solenoid coil and connectable through a needle and said connecting rod on dropping of a needle due to breakage of a warp thread to energize the solenoid to lower the inner end of said switch arm to raise said bar hook across the path of said filling rod arm to abut said arm to cause said hook to tilt said knock-01f lever to actuate said loom stopping means on the front center portion of the stroke of the lay.

4. In a loom having a frame having side walls, an oscillatable lay having a well centrally thereof and means to reciprocate a shuttle across said lay; a mechanical side filling stop motion,

comprising a filling rod pivotally mounted on the i lay extending from said well to adjacent a frame side wall, prongs projecting rearwardly from said rod within said well normally supported at a spaced distance from the bottom of the well by a filling thread laid on passage of the shuttle over the lay and an arm projecting downwardly and forwardly from said rod adjacent said frame side wall, a filling motion cam having a forwardly depending upper cam surface longitudi- .nally adjustably mounted on said loom adjacent the frame side wall at substantially the center portion of the oscillating stroke of the lay, a knock-off lever vertically and longitudinally adjustably pivotally mounted on said loom adjacent said frame side wall adjacent the center portion of the stroke of the lay, having an upper end having a rounded front wall and a flat rear wall tiltable forwardly by said filling rod arm on failure of the filling, means to stop said loom and a rod connecting said knock-off lever to said loom stopping means to stop the loom when the prongs drop to the bottom of the well due to the absence of a filling thread on the lay, and an electric warp stop motion comprising a bar having an upwardly projecting hook at the front end thereof having a flat rear surface, means to pivotally mount the rear end of said bar on the upper end of said knock-01f lever, a magnetic switch having a coil and a movable switch arm actuated by said coil mounted on said loom, adjustable means connecting said switch arm to the front end of said bar to raise said-bar hook across the path of the oscillating filling rod arm, a drop wire needle supported by each warp thread, a transverse supporting rod underlying said needles and normally insulated therefrom, an electric circuit connected to said coil and connectable through a needle and said connecting rod on dropping of a needle due to breakage of a warp thread to raise said switch arm to raise said bar hook across the path of said filling rod arm to abut said arm to cause said hook to tilt said knock-01f lever to actuate said loom stopping means on the front center portion of the stroke of the lay.

5. In a loom having a frame having side walls, an oscillatable lay having a well centrally thereof and means to reciprocate a shuttle across said lay; a mechanical side filling stop motion, comprising a filling rod pivotally mounted on the lay extending from said well to adjacent a frame side wall, prongs projecting rearwardly from said rod within said well normally supported at a spaced distance from the bottom of the well by a filling thread laid on passage of the shuttle over the lay and an arm projecting downwardly and for- 10 wardly from said rod adjacent said frame side wall, a filling motion cam having a forwardly de= pending upper cam surface mounted on said loom adjacent the frame side wall at substantially the center portion of the oscillating stroke 'of the lay, a knock-off lever pivotally mounted on said loom adjacent said frame side wall adjacent the center portion of the stroke of the lay, having an upper end having a rounded front wall and a fiat rear wall tiltable forwardly by said filling rod arm on failure of the filling, means to stop said loom and a rod connecting said knock-off lever to said loom stopping means to stop the loom when the prongs drop to the bottom of the well due to the absence of a filling thread on the lay, and an electric warp stop motion comprising a bar having an upwardly projecting hook at the front end thereof having a fiat rear surface, means to pivotally mount the rear end of said bar on the upper end of said knock-off lever, a magnetic switch having a coil and a movable switch arm actuated by said coil mounted on said'loom, means connecting said switch arm to the front end of said bar to raise said bar hook across the path of the oscillating filling rod arm,

'a drop wire needle supported by each warp thread, a transverse supporting rod underlying said needles and normally insulated therefrom, an electric circuit connected to said coil and connectable through a needle and said connecting rod on dropping of a needle due to breakage of a warp'thread to raise said arm to raise said bar hook across the path of said filling rod arm to abut said, arm to cause said hook to tilt said knock-off lever to actuate said loom stopping means on the front center portion of the stroke of the lay.

6; In, a loom having a frame having side walls, an oscillatable lay having a well centrally thereof, means to reciprocate a shuttle across said lay; a mechanical side filling stop motion, comprising a filling rod pivotally mounted on the lay extending from said well to adjacent a frame side wall,; prongs projecting rearwardly from said rod within said well normally supported at a spaced distance from the bottom of the well by a filling thread laid on passage of the shuttle over the lay and an arm projecting downwardly and forwardly from said rod adjacent said frame side wall, a filling motion cam having a forwardly depending upper cam surface longitudinally adjustably mounted on said loom adjacent the frame side wall at substantially top center of the oscillating stroke of the lay, a knock-off lever vertically and longitudinally adjustably pivotally mounted on said loom adjacent said frame side wall adjacent top center of the stroke of the lay, having an upper end having a rounded front wall and a fiat rear wall tiltable forwardly by said filling rod arm on failure of the filling, means to stop said loom and a, rod connecting said knock-off lever to said 100m stopping means to stop the loom when the prongs drop to the bottom of the well due to the absence of a filling thread on the lay, and an electric warp stop motion comprising a drop wire needle supported by each warp thread, a transverse supporting rod underlying said needles and normally insulated therefrom, a magnetic switch having a coil and a switch arm actuated by said coil mounted on said loom adjacent the lower portion of the side wall thereof adjacent the front portion of the stroke of the a warp thread; a bar having an upwardly projecting hook at the front end thereof having a flat rear surface, means to pivotally mount the rear end of said bar on the upper end of said knock-off lever so that the front end of said bar substantially overlies said switch, adjustable means connecting said switch arm to the front end of said bar of a length on energization of said coil to raise said bar hook across the path of the oscillating filling rod arm to cause said arm to strike said hook to cause said bar to move said knock-off lever forwardly to actuate said loom stopping means on the front center portion of the stroke of the lay.

7. In a loom having a frame having side Walls, an oscillatable lay having a well centrally thereof, means to reciprocate a shuttle across said lay; a mechanical side filling stop motion, comprising a filling rod pivotally mounted on the lay extending from said well to adjacent a frame side wall, prongs projecting rearwardly from said rod within said well normally supported at a spaced distance from the bottom of the well by a filling thread laid on passage of the shuttle over the lay and an arm projecting downwardly and forwardly from said rod adjacent said frame side wall, a filling motion cam having a forwardly depending upper cam surface mounted on said loom adjacent the frame side wall at substantially top center of the oscillating stroke of the lay, a knockoff lever pivotally mounted on said loom adjacent said frame side wall adjacent the top center of the stroke of the lay, having an upper end having a rounded front wall and a flat rear wall tiltable forwardly by said filling rod arm on failure of the filling, means to stop said loom and a rod connecting said knock-01f lever to said loom stopping means to stop the loom when the prongs drop to the bottom of the well due to the absence of a filling thread on the lay, and an electric warp stop motion comprising a drop wire needle supported by each warp thread, a transverse supporting rod underlying said needles and normally insulated therefrom, a magnetic switch having a coil and a switch arm actuated by said coil mounted on said loom; an electric circuit connected to said coil and connectable through a needle and said connecting rod on dropping of a needle 'due to breakage of a warp thread; a bar having an upwardly projecting hook at the front end thereof having a flat rear surface, means to pivotally mounted the rear end of said bar on the upper end of said knock-off lever, means connecting said switch arm to the front end of said bar on energization of said coil to raise said bar hook across the path of the oscillating filling rod arm to cause said arm to strike said hook to cause said bar to move said knock-off lever forwardly to actuate said loom stopping means on the front center portion of the stroke of the lay.

8. In a loom having a frame having side walls, an oscillatable lay, means to reciprocate a shuttle across said lay and loom stopping means; in combination, a mechanical side filling stop motion having an oscillatable filling rod arm, and a knock-off lever abuttable by said arm on failure of filling on said lay to actuate the loom stopping means and an electric warp stop motion, comprising 'a magnetic switch, drop wire needles and an electric circuit actuated on dropping of a needle to actuate said switch; and a bar having an upwardly projecting hook at the front end thereof, having a fiat rear surface, means to pivotally mount the rear end of said bar on the upper end of said knock-01f lever and means connecting said switch to the front end of said bar of a length to raise said bar hook above the normal path of the top of the knock-off lever and across the path of the oscillating filling rod arm to cause said filling rod arm to abut said hook to tilt said knock-off lever to actuate said loom stopping means on the front center portion of the stroke of the lay.

SAMUEL W. LA ROCQUE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED 'STA I ES PATENTS Number Name Date 871,875 'Lanning Nov. '26, 1907 1,011,237 Osgood Dec. '12, 1911 1,243,831 Gagnon Oct. 23, 1917 1,567,511 Johnson Dec. 29, 1925 1,603,448 Came Oct. 19, 1926 1,690,921 Br'uneau Nov. 6, 1928 

